L-Glutamine 500 mg Caps Free Form Amino Acid Amino Acids, the famed building blocks of protein, are essential to the formation of muscle tissue and mass. They have widespread involvement in a range of bodily functions, including efficient brain function and the manufacture of energy. A body in proper balance (homeostasis) needs far more glutamine than any other amino acid, and Nature's Plus L-Glutamine provides 500 mg of this important amino acid. Ingredients L-Glutamine (as ascorbic acid) 500 mg 60 CT